/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * Copyright (c) 1999-2002 Vojtech Pavlik * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation.
*/ #ifndef _UAPI_INPUT_H #define _UAPI_INPUT_H
/** * struct input_absinfo - used by EVIOCGABS/EVIOCSABS ioctls * @value: latest reported value for the axis. * @minimum: specifies minimum value for the axis. * @maximum: specifies maximum value for the axis. * @fuzz: specifies fuzz value that is used to filter noise from * the event stream. * @flat: values that are within this value will be discarded by * joydev interface and reported as 0 instead. * @resolution: specifies resolution for the values reported for * the axis. * * Note that input core does not clamp reported values to the * [minimum, maximum] limits, such task is left to userspace. * * The default resolution for main axes (ABS_X, ABS_Y, ABS_Z, * ABS_MT_POSITION_X, ABS_MT_POSITION_Y) is reported in units * per millimeter (units/mm), resolution for rotational axes * (ABS_RX, ABS_RY, ABS_RZ) is reported in units per radian. * The resolution for the size axes (ABS_MT_TOUCH_MAJOR, * ABS_MT_TOUCH_MINOR, ABS_MT_WIDTH_MAJOR, ABS_MT_WIDTH_MINOR) * is reported in units per millimeter (units/mm). * When INPUT_PROP_ACCELEROMETER is set the resolution changes. * The main axes (ABS_X, ABS_Y, ABS_Z) are then reported in * units per g (units/g) and in units per degree per second * (units/deg/s) for rotational axes (ABS_RX, ABS_RY, ABS_RZ).
*/ struct input_absinfo {
__s32 value;
__s32 minimum;
__s32 maximum;
__s32 fuzz;
__s32 flat;
__s32 resolution;
};
/** * struct input_keymap_entry - used by EVIOCGKEYCODE/EVIOCSKEYCODE ioctls * @scancode: scancode represented in machine-endian form. * @len: length of the scancode that resides in @scancode buffer. * @index: index in the keymap, may be used instead of scancode * @flags: allows to specify how kernel should handle the request. For * example, setting INPUT_KEYMAP_BY_INDEX flag indicates that kernel * should perform lookup in keymap by @index instead of @scancode * @keycode: key code assigned to this scancode * * The structure is used to retrieve and modify keymap data. Users have * option of performing lookup either by @scancode itself or by @index * in keymap entry. EVIOCGKEYCODE will also return scancode or index * (depending on which element was used to perform lookup).
*/ struct input_keymap_entry { #define INPUT_KEYMAP_BY_INDEX (1 << 0)
__u8 flags;
__u8 len;
__u16 index;
__u32 keycode;
__u8 scancode[32];
};
#define EVIOCGNAME(len) _IOC(_IOC_READ, 'E', 0x06, len) /* get device name */ #define EVIOCGPHYS(len) _IOC(_IOC_READ, 'E', 0x07, len) /* get physical location */ #define EVIOCGUNIQ(len) _IOC(_IOC_READ, 'E', 0x08, len) /* get unique identifier */ #define EVIOCGPROP(len) _IOC(_IOC_READ, 'E', 0x09, len) /* get device properties */
/** * EVIOCGMTSLOTS(len) - get MT slot values * @len: size of the data buffer in bytes * * The ioctl buffer argument should be binary equivalent to * * struct input_mt_request_layout { * __u32 code; * __s32 values[num_slots]; * }; * * where num_slots is the (arbitrary) number of MT slots to extract. * * The ioctl size argument (len) is the size of the buffer, which * should satisfy len = (num_slots + 1) * sizeof(__s32). If len is * too small to fit all available slots, the first num_slots are * returned. * * Before the call, code is set to the wanted ABS_MT event type. On * return, values[] is filled with the slot values for the specified * ABS_MT code. * * If the request code is not an ABS_MT value, -EINVAL is returned.
*/ #define EVIOCGMTSLOTS(len) _IOC(_IOC_READ, 'E', 0x0a, len)
#define EVIOCGKEY(len) _IOC(_IOC_READ, 'E', 0x18, len) /* get global key state */ #define EVIOCGLED(len) _IOC(_IOC_READ, 'E', 0x19, len) /* get all LEDs */ #define EVIOCGSND(len) _IOC(_IOC_READ, 'E', 0x1a, len) /* get all sounds status */ #define EVIOCGSW(len) _IOC(_IOC_READ, 'E', 0x1b, len) /* get all switch states */
#define EVIOCSFF _IOW('E', 0x80, struct ff_effect) /* send a force effect to a force feedback device */ #define EVIOCRMFF _IOW('E', 0x81, int) /* Erase a force effect */ #define EVIOCGEFFECTS _IOR('E', 0x84, int) /* Report number of effects playable at the same time */
/** * EVIOCGMASK - Retrieve current event mask * * This ioctl allows user to retrieve the current event mask for specific * event type. The argument must be of type "struct input_mask" and * specifies the event type to query, the address of the receive buffer and * the size of the receive buffer. * * The event mask is a per-client mask that specifies which events are * forwarded to the client. Each event code is represented by a single bit * in the event mask. If the bit is set, the event is passed to the client * normally. Otherwise, the event is filtered and will never be queued on * the client's receive buffer. * * Event masks do not affect global state of the input device. They only * affect the file descriptor they are applied to. * * The default event mask for a client has all bits set, i.e. all events * are forwarded to the client. If the kernel is queried for an unknown * event type or if the receive buffer is larger than the number of * event codes known to the kernel, the kernel returns all zeroes for those * codes. * * At maximum, codes_size bytes are copied. * * This ioctl may fail with ENODEV in case the file is revoked, EFAULT * if the receive-buffer points to invalid memory, or EINVAL if the kernel * does not implement the ioctl.
*/ #define EVIOCGMASK _IOR('E', 0x92, struct input_mask) /* Get event-masks */
/** * EVIOCSMASK - Set event mask * * This ioctl is the counterpart to EVIOCGMASK. Instead of receiving the * current event mask, this changes the client's event mask for a specific * type. See EVIOCGMASK for a description of event-masks and the * argument-type. * * This ioctl provides full forward compatibility. If the passed event type * is unknown to the kernel, or if the number of event codes specified in * the mask is bigger than what is known to the kernel, the ioctl is still * accepted and applied. However, any unknown codes are left untouched and * stay cleared. That means, the kernel always filters unknown codes * regardless of what the client requests. If the new mask doesn't cover * all known event-codes, all remaining codes are automatically cleared and * thus filtered. * * This ioctl may fail with ENODEV in case the file is revoked. EFAULT is * returned if the receive-buffer points to invalid memory. EINVAL is returned * if the kernel does not implement the ioctl.
*/ #define EVIOCSMASK _IOW('E', 0x93, struct input_mask) /* Set event-masks */
#define EVIOCSCLOCKID _IOW('E', 0xa0, int) /* Set clockid to be used for timestamps */
/* * Values describing the status of a force-feedback effect
*/ #define FF_STATUS_STOPPED 0x00 #define FF_STATUS_PLAYING 0x01 #define FF_STATUS_MAX 0x01
/* * Structures used in ioctls to upload effects to a device * They are pieces of a bigger structure (called ff_effect)
*/
/* * All duration values are expressed in ms. Values above 32767 ms (0x7fff) * should not be used and have unspecified results.
*/
/** * struct ff_replay - defines scheduling of the force-feedback effect * @length: duration of the effect * @delay: delay before effect should start playing
*/ struct ff_replay {
__u16 length;
__u16 delay;
};
/** * struct ff_trigger - defines what triggers the force-feedback effect * @button: number of the button triggering the effect * @interval: controls how soon the effect can be re-triggered
*/ struct ff_trigger {
__u16 button;
__u16 interval;
};
/** * struct ff_envelope - generic force-feedback effect envelope * @attack_length: duration of the attack (ms) * @attack_level: level at the beginning of the attack * @fade_length: duration of fade (ms) * @fade_level: level at the end of fade * * The @attack_level and @fade_level are absolute values; when applying * envelope force-feedback core will convert to positive/negative * value based on polarity of the default level of the effect. * Valid range for the attack and fade levels is 0x0000 - 0x7fff
*/ struct ff_envelope {
__u16 attack_length;
__u16 attack_level;
__u16 fade_length;
__u16 fade_level;
};
/** * struct ff_constant_effect - defines parameters of a constant force-feedback effect * @level: strength of the effect; may be negative * @envelope: envelope data
*/ struct ff_constant_effect {
__s16 level; struct ff_envelope envelope;
};
/** * struct ff_ramp_effect - defines parameters of a ramp force-feedback effect * @start_level: beginning strength of the effect; may be negative * @end_level: final strength of the effect; may be negative * @envelope: envelope data
*/ struct ff_ramp_effect {
__s16 start_level;
__s16 end_level; struct ff_envelope envelope;
};
/** * struct ff_condition_effect - defines a spring or friction force-feedback effect * @right_saturation: maximum level when joystick moved all way to the right * @left_saturation: same for the left side * @right_coeff: controls how fast the force grows when the joystick moves * to the right * @left_coeff: same for the left side * @deadband: size of the dead zone, where no force is produced * @center: position of the dead zone
*/ struct ff_condition_effect {
__u16 right_saturation;
__u16 left_saturation;
__s16 right_coeff;
__s16 left_coeff;
__u16 deadband;
__s16 center;
};
/** * struct ff_periodic_effect - defines parameters of a periodic force-feedback effect * @waveform: kind of the effect (wave) * @period: period of the wave (ms) * @magnitude: peak value * @offset: mean value of the wave (roughly) * @phase: 'horizontal' shift * @envelope: envelope data * @custom_len: number of samples (FF_CUSTOM only) * @custom_data: buffer of samples (FF_CUSTOM only) * * Known waveforms - FF_SQUARE, FF_TRIANGLE, FF_SINE, FF_SAW_UP, * FF_SAW_DOWN, FF_CUSTOM. The exact syntax FF_CUSTOM is undefined * for the time being as no driver supports it yet. * * Note: the data pointed by custom_data is copied by the driver. * You can therefore dispose of the memory after the upload/update.
*/ struct ff_periodic_effect {
__u16 waveform;
__u16 period;
__s16 magnitude;
__s16 offset;
__u16 phase;
struct ff_envelope envelope;
__u32 custom_len;
__s16 __user *custom_data;
};
/** * struct ff_rumble_effect - defines parameters of a periodic force-feedback effect * @strong_magnitude: magnitude of the heavy motor * @weak_magnitude: magnitude of the light one * * Some rumble pads have two motors of different weight. Strong_magnitude * represents the magnitude of the vibration generated by the heavy one.
*/ struct ff_rumble_effect {
__u16 strong_magnitude;
__u16 weak_magnitude;
};
/** * struct ff_effect - defines force feedback effect * @type: type of the effect (FF_CONSTANT, FF_PERIODIC, FF_RAMP, FF_SPRING, * FF_FRICTION, FF_DAMPER, FF_RUMBLE, FF_INERTIA, or FF_CUSTOM) * @id: an unique id assigned to an effect * @direction: direction of the effect * @trigger: trigger conditions (struct ff_trigger) * @replay: scheduling of the effect (struct ff_replay) * @u: effect-specific structure (one of ff_constant_effect, ff_ramp_effect, * ff_periodic_effect, ff_condition_effect, ff_rumble_effect) further * defining effect parameters * * This structure is sent through ioctl from the application to the driver. * To create a new effect application should set its @id to -1; the kernel * will return assigned @id which can later be used to update or delete * this effect. * * Direction of the effect is encoded as follows: * 0 deg -> 0x0000 (down) * 90 deg -> 0x4000 (left) * 180 deg -> 0x8000 (up) * 270 deg -> 0xC000 (right)
*/ struct ff_effect {
__u16 type;
__s16 id;
__u16 direction; struct ff_trigger trigger; struct ff_replay replay;
union { struct ff_constant_effect constant; struct ff_ramp_effect ramp; struct ff_periodic_effect periodic; struct ff_condition_effect condition[2]; /* One for each axis */ struct ff_rumble_effect rumble;
} u;
};
/* * ff->playback(effect_id = FF_GAIN) is the first effect_id to * cause a collision with another ff method, in this case ff->set_gain(). * Therefore the greatest safe value for effect_id is FF_GAIN - 1, * and thus the total number of effects should never exceed FF_GAIN.
*/ #define FF_MAX_EFFECTS FF_GAIN
#define FF_MAX 0x7f #define FF_CNT (FF_MAX+1)
#endif/* _UAPI_INPUT_H */
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